Global Re-Analysis Confirms Absence of the DNAJB1::PRKACA Fusion in Hepatoblastoma. Comment on Fleifil et al. DNAJB1-PKAc Kinase Is Expressed in Young Patients with Pediatric Liver Cancers and Enhances Carcinogenic Pathways. Cancers 2025, 17, 83.

Fleifil et al. recently reported the DNAJB1::PRKACA fusion in 70% of hepatoblastomas (HB), suggesting its diagnostic relevance beyond fibrolamellar carcinoma (FLC). Here, an international consortium re-examined this claim using 225 independent assays across 148 HB samples from five institutions. We found no evidence of the DNAJB1::PRKACA fusion in any HB case, in contrast to 286/290 FLC samples. These findings demonstrate that the fusion remains specific to FLC and underscore the need for rigorous validation before clinical interpretation of molecular findings in pediatric liver tumors.